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July 19th, 2026 :: 3:10 pm CDT   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated July 19th at 1:54 pm 
haze
Temperature:84°F Dew Point:68°F
Barometer:29.98 inHg Wind:N 15 Mph
Humidity:58.4% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Jul 19th
Monday
Jul 20th
Tuesday
Jul 21st
Wednesday
Jul 22nd
Thursday
Jul 23rd
Sunny Mostly Sunny Mostly Sunny Mostly Sunny Mostly Sunny
78°F
81°F
63°F
84°F
70°F
72°F
57°F
74°F
56°F
 
 Decatur Detailed Weather Forecast  
 
Sunday, July 19th, 2026
Afternoon Temperature: 78°F
Sunny. Windy at times.
Evening Temperature: 71°F
Clear.
Monday, July 20th, 2026
Overnight Temperature: 64°F
Mostly clear.
Morning Temperature: 69°F
Sunny.
Afternoon Temperature: 80°F
Sunny.
Evening Temperature: 76°F
Clear. Chance of a thunderstorm.
Tuesday, July 21st, 2026
Overnight Temperature: 72°F
Clear. Chance of a thunderstorm. Windy at times.
Morning Temperature: 76°F
A mix of sun and cloud with a chance of showers or thundershowers. Windy at times.
Afternoon Temperature: 83°F
Mostly sunny with a chance of showers or thundershowers. Windy at times.
Evening Temperature: 73°F
Mostly clear. Windy at times.
Wednesday, July 22nd, 2026
Overnight Temperature: 59°F
Clear.
Morning Temperature: 61°F
Sunny.
Afternoon Temperature: 72°F
Mostly sunny.
Evening Temperature: 65°F
A mix of clear and cloudy skies.
Thursday, July 23rd, 2026
Overnight Temperature: 57°F
Mostly clear.
Morning Temperature: 64°F
Mostly sunny.
Afternoon Temperature: 73°F
Mostly sunny.
Evening Temperature: 65°F
A mix of cloudy and clear skies with a chance of showers.
Friday, July 24th, 2026
Overnight Temperature: 61°F
Mostly cloudy with a chance of showers.
Morning Temperature: 60°F
Mostly cloudy with periods of rain.
Afternoon Temperature: 60°F
Cloudy with showers.
Evening Temperature: 59°F
A mix of cloudy and clear skies with a few showers. Windy at times.
Saturday, July 25th, 2026
Overnight Temperature: 55°F
Clear.
Morning Temperature: 62°F
Sunny. Windy at times.
Afternoon Temperature: 76°F
Sunny. Windy at times.
Evening Temperature: 70°F
Clear.
Sunday, July 26th, 2026
Overnight Temperature: 63°F
Clear.
Morning Temperature: 68°F
Sunny.
Afternoon Temperature: 80°F
Mostly sunny.
Evening Temperature: 73°F
Mostly clear.
Monday, July 27th, 2026
Overnight Temperature: 66°F
Clear with cloudy periods.
Morning Temperature: 71°F
Mostly sunny.
Afternoon Temperature: 80°F
Sunny with cloudy periods. Chance of a thunderstorm. Windy at times.
Evening Temperature: 77°F
Clear. Chance of a thunderstorm.





 

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This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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